Beneath Apple DOS is intended to serve as a companion to
DOS Manual, providing additional information for the
advanced programmer or the novice Apple user who wants to
know more about the structure of diskettes. It is not the
intent of this manual to replace the documentation provided
by Apple Computer Inc. Although, for the sake of
continuity, some of the material covered in the Apple manual
is also covered here. it will be assumed that the reader is
reasonably familiar with the contents of the DOS Manual.